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X-WR-CALNAME:Atlanta Geological Society
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X-WR-CALDESC:Events for Atlanta Geological Society
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240924T180000
DTEND;TZID=America/New_York:20240924T200000
DTSTAMP:20260418T225853
CREATED:20240903T131131Z
LAST-MODIFIED:20240910T201848Z
UID:2653-1727200800-1727208000@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting - September
DESCRIPTION:Speaker: Rob McDowell\, Assistant Professor\, Georgia State University – Perimeter College\nTopic: –Scotland: Appalachian Geology Across the Sea \nWhen: September 24\, 2024\n6:00: Social: refreshments and snacks served\n6:45: Business meeting (zoom starts)\n7:00: Presentation \nThe meeting will be in person at the Fernbank Museum and via zoom. Click on this link to join meeting via zoom.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-september/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240921T100000
DTEND;TZID=America/New_York:20240921T120000
DTSTAMP:20260418T225853
CREATED:20240903T131918Z
LAST-MODIFIED:20240903T132108Z
UID:2656-1726912800-1726920000@atlantageologicalsociety.org
SUMMARY:PG Workshop - Engineering Geology
DESCRIPTION:Speaker: Benjamin Black \nPlease join us and forward this message to anyone interested in becoming a Georgia Registered Professional Geologist\, or anyone who might be interested in the topic.  Two Professional Development Hours are available for attendees of the class.  The classes are open to all\, membership in the AGS is encouraged\, but not required. \nTo register for this class\, please click here
URL:https://atlantageologicalsociety.org/event/pg-workshop-engineering-geology/
LOCATION:Online via Zoom
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240914T100000
DTEND;TZID=America/New_York:20240914T120000
DTSTAMP:20260418T225853
CREATED:20240903T130536Z
LAST-MODIFIED:20240903T130536Z
UID:2651-1726308000-1726315200@atlantageologicalsociety.org
SUMMARY:PG Workshop - GEOLOGY OF CAVES AND KARST
DESCRIPTION:GEOLOGY OF CAVES AND KARST \nInstructor: Steve Stokowski is a past VP of the Atlanta Geological Society and is active in many professional organizations.  He holds a B.S. in Geology from George Washington University and a M.S. in Geology from the South Dakota School of Mines and Technology.  He is a Fellow of the National Speleological Society\, taught Speleology for the Smithsonian Associates\, and started the long-running NSS Short Course “Speleology for Cavers.”  Come learn how limestone bedding types and rock textures\, folding\, and faulting affect the location and size of caves and karst features. Learn how caves form in the deep subsurface and along river terraces. Bring home with you the geologic reason of parallel passages\, the hydraulic reason for elliptical passage cross-sections\, and the meaning to speleologists of Bogli’s mixing corrosion. \nPlease join us and forward this message to anyone interested in becoming a Georgia Registered Professional Geologist\, or anyone who might be interested in the topic.  Two Professional Development Hours are available for attendees of the class.  The classes are open to all\, membership in the AGS is encouraged\, but not required. \nTo register for this class\, please click here
URL:https://atlantageologicalsociety.org/event/pg-workshop-geology-of-caves-and-karst/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240827T180000
DTEND;TZID=America/New_York:20240827T200000
DTSTAMP:20260418T225853
CREATED:20240410T202537Z
LAST-MODIFIED:20240816T212800Z
UID:2574-1724781600-1724788800@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:Atlanta Geological Society Monthly Meeting. \nSpeaker: Bill Witherspoon \nTopic: Along the Divide – What Shapes Our Mountains? \nAbstract: Trivia question — What connects Okefenokee Swamp\, the Georgia State Capitol\, the trailhead at North Carolina’s Whiteside Mountain\, and Terra Incognita Vineyard near Clarkesville?  Answer — the Eastern Continental Divide (ECD). \nI created “Along the Divide” for a “talk & walk” this month at Terra Incognita Vineyard. The program traces the ECD from the sandhills of Florida through Atlanta to the peaks of North Carolina. In northeast Georgia\, the focus is on the stream capture event that led to Tallulah Gorge and a signature bend in the GA-SC boundary. At Whiteside\, the program considers a travel writer’s claim that this is “the world’s oldest mountain” and argues that the opposite is closer to the truth. This leads into the recent excitement over possible Neogene uplift in the Southern Appalachians as well as pushback in a 2022 review article by Virginia Tech researchers.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-25/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240815T180000
DTEND;TZID=America/New_York:20240815T200000
DTSTAMP:20260418T225853
CREATED:20240202T170439Z
LAST-MODIFIED:20240202T170439Z
UID:2539-1723744800-1723752000@atlantageologicalsociety.org
SUMMARY:AGS Executive Committee Meeting
DESCRIPTION:AGS Executive Committee Meeting via zoom
URL:https://atlantageologicalsociety.org/event/ags-executive-committee-meeting-3/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240804T083000
DTEND;TZID=America/New_York:20240804T113000
DTSTAMP:20260418T225853
CREATED:20240710T221058Z
LAST-MODIFIED:20240710T221058Z
UID:2603-1722760200-1722771000@atlantageologicalsociety.org
SUMMARY:Field trip to Arabia Mountain
DESCRIPTION:Following is taken from abstract by Dr. Aislin N. Reynolds\, Georgia Tech \nThe formation of surface parallel exfoliation fractures in rock domes produces some of the most celebrated and curious landforms on Earth. More than a century of observations\, including direct measurement of active exfoliation events\, highlight the key roles of solar heating and subcritical fracture propagation in rock exfoliation. Here we present new insights from Arabia Mountain\, a biotite orthogneiss dome near Atlanta\, Georgia (USA) that experienced a spontaneous exfoliation event of a formerly quarried surface in July 2023. The event uplifted a ~250 m2 area over 30 cm\, as revealed by digital elevation model differencing and field measurements. Following the event\, instrumentation was installed to monitor continued fracturing during summer 2024\, including surface parallel stresses\, local seismic waves\, and surface air and rock temperatures. Multiple additional exfoliation events were witnessed in-person during equipment installation\, including direct observation of progressive fracture propagation and explosion. \nParticipants will meet at the Davidson-Arabia Mountain Nature Center at 8:30 AM on Sunday\, August 4th\, 2024. The hike will start at 9:00 and last until approximately 11:30 AM. Please bring water and sun protection. \nParticipants must complete a waiver: https://atlantageologicalsociety.org/participation-waiver/
URL:https://atlantageologicalsociety.org/event/field-trip-to-arabia-mountain/
LOCATION:Arabia Mtn Nature Ctr\, 3787 Klondike Rd\, Stonecrest\, GA\, 30038\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240730T180000
DTEND;TZID=America/New_York:20240730T190000
DTSTAMP:20260418T225853
CREATED:20240710T215520Z
LAST-MODIFIED:20240710T232928Z
UID:2601-1722362400-1722366000@atlantageologicalsociety.org
SUMMARY:Special Online Presentation--Thermally Induced Fracturing: New Insights from Active Exfoliation at Arabia Mountain\, Georgia
DESCRIPTION:This presentation provides geologic background prior to a field trip to the Arabia Mountain on August 4\, 2024 \nThe speaker will be Dr. Aislin N. Reynolds\, President’s Postdoctoral Fellow at Georgia Tech \nAbstract: The formation of surface parallel exfoliation fractures in rock domes produces some of the most celebrated and curious landforms on Earth. In 1904\, G.K. Gilbert outlined three mechanisms to produce exfoliation fractures: (1) original cooling of the rock\, (2) decompression during rock exhumation\, or (3) post-exhumation surface processes. More than a century of observations\, including direct measurement of active exfoliation events\, highlight the key roles of solar heating and subcritical fracture propagation in rock exfoliation. Here we present new insights from Arabia Mountain\, a biotite orthogneiss dome near Atlanta\, Georgia (USA) that experienced a spontaneous exfoliation event of a formerly quarried surface in July 2023. The event uplifted a ~250 m2 area over 30 cm\, as revealed by digital elevation model differencing and field measurements. Following the event\, instrumentation was installed to monitor continued fracturing during summer 2024\, including surface parallel stresses\, local seismic waves\, and surface air and rock temperatures. Multiple additional exfoliation events were witnessed in-person during equipment installation\, including direct observation of progressive fracture propagation and explosion. Observations and stress and seismic measurements all suggest a strong correlation with diurnal thermal cycles as captured by thermal sensors. These observations are compared with predicted stress distribution models informed by bulk-property measurements and regional geologic conditions to investigate the broader question: is the formation of exfoliation joints more sensitive to surface processes (e.g. solar heating and weathering)\, confining stresses related to topography and erosion\, or interactions of regional (i.e. tectonic) stresses with topography? Understanding the mechanisms driving exfoliation fracturing in rock domes will better constrain the sensitivities of these domes to future climate evolution\, with implications for forecasting rockfall hazards.
URL:https://atlantageologicalsociety.org/event/special-online-presentation-exfoliation-fractures-at-arabia-mountain/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240727T100000
DTEND;TZID=America/New_York:20240727T120000
DTSTAMP:20260418T225853
CREATED:20240725T150650Z
LAST-MODIFIED:20240725T150650Z
UID:2623-1722074400-1722081600@atlantageologicalsociety.org
SUMMARY:PG Workshop: Petrology and Petrography
DESCRIPTION:Topic: Professional Geologist Candidate Workshop: Petrology and Petrography\n\nInstructor: Steven Stokowski\n\nWhen: 10am-12noon\, July 27\, 2024\n\nWhere: Zoom presentation. To sign up\, please click here\n\nCourse Syllabus: This review will cover petrography and petrology relevant to minerals and rocks. Emphasis will be on facts and calculations that are likely to be presented in the ASBOG Exam. The petrography review will focus upon the microscope tools and microscope methods used by geologists to perform their duties. The primary focus will be on reflected light (RL) and polarized light microscopes (PLM)\, ubiquitous in classic geology departments\, but often optional in departments that emphasize groundwater and environmental geology. The petrology review will cover the classification and origin of igneous\, metamorphic\, and sedimentary rocks\, including coal. I will discuss field and laboratory classifications based upon color\, grain size\, and mineral content.\n 
URL:https://atlantageologicalsociety.org/event/pg-workshop-petrology-and-petrography/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240625T180000
DTEND;TZID=America/New_York:20240625T200000
DTSTAMP:20260418T225853
CREATED:20240316T003647Z
LAST-MODIFIED:20240316T003647Z
UID:2561-1719338400-1719345600@atlantageologicalsociety.org
SUMMARY:AGS Annual BBQ Social
DESCRIPTION:It’s time to start planning for the annual BBQ social. Remember last year’s event with lots of door prizes and Tony and his jokes? Who can top that?  Well\, we can try but we need volunteers\, and sponsors to make it happen. We only have three more monthly meetings before the Social. So\, in the next few weeks\, can you or your company provide a $100-$200 donation to help sponsor this annual event?  Or maybe you can volunteer and join me to set up/clean up the dining area\, check in guests\, take dues\, help with door prizes or you could be the Master of Ceremonies. Think about it and let me know as soon as you can. \nIf you have never been to the June BBQ Social it will be in the rotunda with the dinosaurs. Reservations are not needed but I will try to get a head count so I can buy enough food to have leftovers. The dinner menu includes barbecue chicken and pork\, bread\, mac and cheese\, BBQ beans\, sweet and unsweet tea\, and cobbler and cookies for dessert. While we eat\, Pamela will give her presidential address followed by door prize giveaways. The Big Screen Movie starts after dinner. Sponsors are welcome to set up a meet and greet table or give a short presentation. \nPlease let me know if you can help out\, bring company SWAG\, geology books\, maps\, rocks\, fossils donations for door prizes. Thanks again John Salvino Hospitality Chair and Treasurer johnsalvino@bellsouth.net \nAnnual BBQ Social: Tuesday\, 6pm\, June 25\, 2024 - *Members Free\, Guests $5\n*Membership must be current for 2024. To renew your membership\, please click here
URL:https://atlantageologicalsociety.org/event/ags-annual-bbq-social-2/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240528T180000
DTEND;TZID=America/New_York:20240528T200000
DTSTAMP:20260418T225853
CREATED:20231012T174834Z
LAST-MODIFIED:20240410T202331Z
UID:2476-1716919200-1716926400@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:May 28\, 2024\, 6pm: Atlanta Geological Society monthly meeting. \nSpeaker: Jessica Turner\, GEI Consultants. \nTopic: Brownfields.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-24/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240502T180000
DTEND;TZID=America/New_York:20240502T200000
DTSTAMP:20260418T225853
CREATED:20240202T170339Z
LAST-MODIFIED:20240202T170339Z
UID:2537-1714672800-1714680000@atlantageologicalsociety.org
SUMMARY:AGS Executive Committee Meeting
DESCRIPTION:AGS Executive Committee Meeting via zoom
URL:https://atlantageologicalsociety.org/event/ags-executive-committee-meeting-2/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240430T180000
DTEND;TZID=America/New_York:20240430T200000
DTSTAMP:20260418T225853
CREATED:20231012T174706Z
LAST-MODIFIED:20240410T202738Z
UID:2474-1714500000-1714507200@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:April 30\, 2024\, 6pm: Atlanta Geological Society monthly meeting. \nSpeaker: Anthony Boxleiter\, Ga State University. \nTopic: A new look at the Late Cretaceous-Eocene stratigraphy of the Upper Coastal Plain of central Georgia
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-23/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240326T180000
DTEND;TZID=America/New_York:20240326T200000
DTSTAMP:20260418T225853
CREATED:20231012T174607Z
LAST-MODIFIED:20231012T174607Z
UID:2472-1711476000-1711483200@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:March 26\, 2024\, 6pm: Atlanta Geological Society monthly meeting. \nSpeaker: Christy Visaggi\, Ga State University. \nTopic: Paleontological resources in the National Park Service: stories from the field and in the collections.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-22/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240321T180000
DTEND;TZID=America/New_York:20240321T200000
DTSTAMP:20260418T225853
CREATED:20240202T170246Z
LAST-MODIFIED:20240202T170246Z
UID:2535-1711044000-1711051200@atlantageologicalsociety.org
SUMMARY:AGS Executive Committee Meeting
DESCRIPTION:AGS Executive Committee Meeting via zoom
URL:https://atlantageologicalsociety.org/event/ags-executive-committee-meeting/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240227T180000
DTEND;TZID=America/New_York:20240227T200000
DTSTAMP:20260418T225853
CREATED:20231012T174508Z
LAST-MODIFIED:20231012T174508Z
UID:2470-1709056800-1709064000@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:February 27\, 2024\, 6pm: Atlanta Geological Society monthly meeting. \nSpeaker: Andy Newman\, Georgia Tech. \nTopic:  Understanding earthquake and tsunami behavior in subduction zones.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-21/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240224T100000
DTEND;TZID=America/New_York:20240224T120000
DTSTAMP:20260418T225853
CREATED:20240215T190909Z
LAST-MODIFIED:20240215T191726Z
UID:2548-1708768800-1708776000@atlantageologicalsociety.org
SUMMARY:PG Workshop: Hydrogeology
DESCRIPTION:This workshop will be offered via zoom \nCourse Syllabus: The workshop will explore current practices in the field of hydrogeology with an emphasis on water resources. Mr. Foldesi will cover techniques utilized for groundwater exploration and development in both bedrock and coastal plain environments. The process of implementing and maintaining Aquifer storage and recovery (ASR) projects will be reviewed. Mr. Foldesi will also discuss saltwater intrusion studies\, the hydrogeologic component of implementing land application systems (LAS) projects\, and his recent involvement with utilizing limestone quarries as a water resource. Mr. Foldesi will share his experience in constructing\, calibrating\, and performing predictions with groundwater models to support diverse projects involving alternative aquifer development\, groundwater permitting support\, mine dewatering\, LAS mounding studies\, and ASR development. \n​Course Instructor: Chris Foldesi has over 20 years of experience as a water resource hydrogeologist. He is experienced in aquifer test planning and analysis\, wellfield design\, and groundwater source development. Chris is a registered Professional Geologist in Georgia\, North Carolina\, and South Carolina. He has been involved in Aquifer Storage Recovery (ASR) projects since graduate school\, when he produced a MODFLOW groundwater model utilized to predict the performance of multiple ASR wells at Greenville\, North Carolina\, as part of his Master’s thesis at East Carolina University. Chris has been the lead hydrogeologist on several ASR projects in both North Carolina and South Carolina\, where he has been involved with site selection\, target aquifer selection\, coring\, regulatory compliance\, detailed aquifer testing\, and final ASR well construction activities. He is an experienced groundwater modeler and has designed and calibrated predictive models dealing with diverse problems such as mine dewatering\, alternative aquifer development\, ASR\, and Land Application Systems. Chris has been involved in saltwater intrusion studies in a variety of coastal settings in both North and South Carolina. Chris has been the lead hydrogeologist on several alternative aquifer testing and exploration projects and many other water resource related groundwater projects throughout his career. \nAGS Members may participate: to obtain zoom link contact Ben Black at: benjamin.black@geologicllc.net \nTo Join AGS: https://atlantageologicalsociety.org/member-benefits-4/ \n 
URL:https://atlantageologicalsociety.org/event/pg-workshop-hydrogeology/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240130T180000
DTEND;TZID=America/New_York:20240130T200000
DTSTAMP:20260418T225853
CREATED:20231012T174409Z
LAST-MODIFIED:20231012T174409Z
UID:2468-1706637600-1706644800@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:January 30\, 2024\, 6pm: Atlanta Geological Society monthly meeting. \nSpeaker: Zhigang Peng\, Georgia Tech. \nTopic: Ongoing studies of southeastern earthquakes.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-20/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20240127T100000
DTEND;TZID=America/New_York:20240127T120000
DTSTAMP:20260418T225853
CREATED:20240106T153717Z
LAST-MODIFIED:20240106T153717Z
UID:2508-1706349600-1706356800@atlantageologicalsociety.org
SUMMARY:January 27 Professional Geologist Candidate Workshop: Geophysics
DESCRIPTION:When: 10am-12noon\, January 27\, 2024\nWhere: Zoom presentation.  Contact Benjamin Black for login details: benjamin.black@geologicllc.net \nCourse Syllabus: Geophysical techniques are often cost-effective and safe ways to investigate the subsurface. Using these tools\, engineers and geologists can characterize sites and image subsurface conditions better.  Common applications include determining lithology\, depth to rock\, integrity and quality of rock masses\, fracture and foliation orientation\, locating subsurface hazards such as voids or manmade objects (utilities\, storage tanks\, waste\, burials etc.)\, and prospecting for natural resources.   Geophysical methods can be deployed from the land surface\, from the air\, on bodies of water\, and in borings. \nSome of the most common methods used are electrical resistivity imaging\, electromagnetic methods\, seismic methods (seismic refraction\, seismic reflection\, and surface waves)\, ground penetrating radar\, magnetic methods\, gravity methods\, and geophysical borehole logging. Geophysical methods work very well in tandem with a boring program for imaging the subsurface between boreholes. Also\, boring data is often critical for calibrating geophysical data to develop accurate subsurface models using geophysics.  In this presentation\, I will explain how each method work and the output\, and discuss applications and limitations. \n​Course Instructor: Jorgen Bergstrom is a licensed geophysicist and geologist and an expert in the field of near-surface geophysics.  He has over 25 years of experience with geophysical methods and instruments in the United States and Europe. During his career\, he has conducted numerous geophysical investigations\, assisting clients with characterizing the subsurface using geophysical methods\, and has authored numerous published papers discussing various geophysical technologies.
URL:https://atlantageologicalsociety.org/event/january-27-professional-geologist-candidate-workshop-geophysics/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20231128T180000
DTEND;TZID=America/New_York:20231128T200000
DTSTAMP:20260418T225853
CREATED:20231012T174302Z
LAST-MODIFIED:20231012T174302Z
UID:2466-1701194400-1701201600@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:November 28\, 2023\, 6pm: Atlanta Geological Society monthly meeting \nSpeaker: Daniel Gebregiorgis Yirgaw\, Ga State University. \nTopic: to be announced.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-19/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20231114T190000
DTEND;TZID=America/New_York:20231114T200000
DTSTAMP:20260418T225853
CREATED:20231012T174139Z
LAST-MODIFIED:20231012T174139Z
UID:2464-1699988400-1699992000@atlantageologicalsociety.org
SUMMARY:AGS Special Zoom / Facebook Live Presentation
DESCRIPTION:November 14\, 2023\, 7pm: Special Zoom and Facebook Live presentation. \nSpeaker: Wilson (Wai-Yin) Cheung\, Queens University of Ontario. \nTopic: Physical Geography and Climate Change in the Greenland and Canadian Arctic.
URL:https://atlantageologicalsociety.org/event/ags-special-zoom-facebook-live-presentation/
LOCATION:GA
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20231024T180000
DTEND;TZID=America/New_York:20231024T200000
DTSTAMP:20260418T225853
CREATED:20230915T183506Z
LAST-MODIFIED:20230915T184019Z
UID:2450-1698170400-1698177600@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:Speaker Ajoy Baksi \nTopic: The timing and duration of flood basalt traps\, India and the Columbia River Basalt Group\, USA. \nSpeaker bio: Ajoy Baksi obtained a M.S. (1967) and Ph.D. (1970)\, from the University of Toronto (Canada) in (Geo)Physics\, following degrees in Physics and Exploration Geophysics in India. Worked in Canada\, India and Australia\, before moving to Louisiana State University in 1982. Research was focused on geochronology (argon dating methods) and geochemistry; retired in 2008 and moved to Atlanta in 2019. In “Emeritus state” have continued to publish occasionally. Most recently three papers in 2022\, on the Deccan and Rajmahal Traps (India)\, Columbia River Basalts (USA). \nAbstract: Interest in flood basalt volcanism (encompassing > 200\,000 km3 of rocks) has increased over the past 60 years\, including the possible effect on the environment\, of their eruption. This effort looks at the latest research on geochronological aspects of their timing and duration of formation. Until the last decade\, the argon dating methods were the the only tools used for this purpose. Initial K-Ar work in the 1970s\, on whole-rock basalts\, showed that bulk of the Columbia River Basalt (CRB) was formed in < 2 m.y. at ~16 Ma. The next two decades produced scattered results for the Deccan and Rajmahal Traps (India)\, the CRB (USA)\, the Siberian Traps (Russia)\, the Parana (South America) and Karoo and Etendeka (South Africa). Following improvements on technical fronts\, 40Ar/39Ar dating of both whole-rock samples and plagioclase separates\, showed that the bulk of the Siberian Traps and Parana were (each) formed in ~ 1 m.y. around 250 Ma and 135 Ma\, respectively. This effort summaries work on the Deccan and the CRB over the past decade. The latest 40Ar/39Ar results show that each of these was formed in ~ 700 ka around 66 Ma and 16.4 Ma\, respectively. The advent of U-Pb dating on single zircons\, taken from layers intercalated with the flows in these provinces\, has reinforced these conclusions. The obstacles facing such efforts are examined\, as well as the lacunae of the 40Ar/39Ar and U-Pb dating methods. These techniques produce ages with precision < ±0.5 m.y. over the Phanerozoic; their accuracy must be carefully judged on both geological and physical/mathematical grounds. \n 
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-18/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230926T180000
DTEND;TZID=America/New_York:20230926T200000
DTSTAMP:20260418T225853
CREATED:20230612T155304Z
LAST-MODIFIED:20230612T155304Z
UID:2403-1695751200-1695758400@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-17/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230829T180000
DTEND;TZID=America/New_York:20230829T200000
DTSTAMP:20260418T225853
CREATED:20230612T155120Z
LAST-MODIFIED:20230612T155120Z
UID:2400-1693332000-1693339200@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-16/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230826T100000
DTEND;TZID=America/New_York:20230826T120000
DTSTAMP:20260418T225853
CREATED:20230722T154350Z
LAST-MODIFIED:20230722T154350Z
UID:2426-1693044000-1693051200@atlantageologicalsociety.org
SUMMARY:PG Exam Workshop: Petrology and Petrography
DESCRIPTION:Zoom presentation. Contact Ben Black at benjamin.black@geologicllc.net for login information (AGS membership required) \nCourse Syllabus: This review will cover petrography and petrology relevant to minerals and rocks. Emphasize will be on facts and calculations that are likely to be presented in the ASBOG Exam. The petrography review will focus upon the microscope tools and microscope methods used by geologists to perform their duties. The primary focus will be on reflected light (RL) and polarized light microscopes (PLM)\, ubiquitous in classic geology departments\, but often optional in departments that emphasize groundwater and environmental geology. The petrology review will cover the classification and origin of igneous\, metamorphic\, and sedimentary rocks\, including coal. I will discuss field and laboratory classifications based upon color\, grain size\, and mineral content.\nAfter discussing the tools and methods of petrography\, we will review mineralogy and then mineral identification with a microscope. The major chemical and crystal classes of minerals will be covered\, followed by their diagnostic features and associations. Then\, the characteristic features of minerals in thin section will be presented. This will include crystal shapes\, pleochroism\, birefringence\, twinning\, and associated and alteration minerals. The IUGS classification schemes for plutonic and volcanic rocks will be described including QAPF diagrams. Bowen’s reaction series will be covered as will phase equilibria. For metamorphic rocks\, the fabric\, composition\, and mineral facies schemes and their applications will be presented. Sediments and sedimentary rocks will be subdivided into quartz and silicate-rich sediments and rocks\, carbonate sediments and rocks (limestones and dolomites)\, carbonaceous sediments and rocks (peat\, lignite\, bituminous coal\, etc.)\, and other\, less-common\, rock types. The identification of heavy minerals will be presented\, as will grain size\, roundness\, and texture analysis analyses of sediment grains. The relationship of Goldich’s dissolution series and Bowen’s series will be explained\, and how Goldich’s observations explain the chemical and mineral composition of sedimentary rocks\, especially arenites through lutites. For carbonate rocks\, the highlights of the distinctions between limestones and dolomites will be covered\, as will carbonate rock classification schemes\, especially Folk’s particle type and texture classification. For carbonaceous sediments\, we will discuss the characteristics of peat through anthracite. \nInstructor: Steven Stokowski\, CPG\, is the owner and materials geologist of Stone Products Consultants. Steve’s primary professional interests are aggregates and concrete petrography. Steve has extensive geological and petrographic experience across the US. He has a MS in Geology from the South Dakota School of Mines and Technology and a BS in Geology from George Washington University. Steve is the Treasurer of the AIPG Atlanta Section\, the 2014 recipient of the Herbert C. Hoover Award from the Washington DC Section of the Society for Mining\, Metallurgy and Exploration (SME)\, the 2017 Robert W. Piekarz Award from SME\, and the past Chair of the Industrial Minerals and Aggregates Division of SME. He is Registered or Certified as a Geologist in Georgia\, Indiana\, Maine\, Virginia and other states.
URL:https://atlantageologicalsociety.org/event/pg-exam-workshop-petrology-and-petrography/
LOCATION:GA
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230730T083000
DTEND;TZID=America/New_York:20230730T110000
DTSTAMP:20260418T225853
CREATED:20230726T145045Z
LAST-MODIFIED:20230726T145045Z
UID:2432-1690705800-1690714800@atlantageologicalsociety.org
SUMMARY:SPECIAL EVENT: Field trip to Arabia Mtn to investigate recent exfoliation "popup explosion"
DESCRIPTION:Field Trip to Arabia Mountain\, Stonecrest\, GA: AGS Members are invited to a special field trip to investigate a recent exfoliation popup that occurred on July 17th at Arabia Mountain \nOpen to AGS membership. To join AGS go to: https://atlantageologicalsociety.org/join-now/ \nRegistration is mandatory–complete the field trip waiver form at: \nhttps://atlantageologicalsociety.org/participation-waiver/ Under “describe” use “Arabia Mt. 7/17/23 Pop-up field”) \nWhen: 8:30am-11:00am\, Sunday July 30\, 2023 \nWhere: Meet at Davidson-Arabia Mountain Nature Center\, 3787 Klondike Rd\, Stonecrest\, GA 30038 and walk about 1 mile* to site near kiosk close to Arabia Lake on the west side of the Nature Preserve. \nField trip description: AGS members will investigate a site approximately 60 m x 35 m with exfoliation pop-up structures of many shapes and scales\, which formed in a thermal explosive event around mid-day (12:15 pm) on July 17\, 2023. Pictures of the structures by Alan Cressler are at this link and those by Ranger Rick Kersey (along with July 23 pictures and Google Earth overviews by Bill Witherspoon) are at this link. Although the white dust in the 7/18-19 pictures has washed away\, the features are still easily recognized. Their position astride a popular trail is the reason for timing this trip as early as possible after the event. The field trip leaders are still searching the literature for any documentation of a multi-pop-up event such as this one. The field trip’s intention is to put more geologist eyes and brains on the site. Please attend if you can\, and be part of discovering something that may be new in the literature. \nThe walk to the site* is level to slightly downhill. There is a woods route back to the Nature Center to avoid late-morning heat. Use sunscreen and hat and bring water. \nLeaders: Bill Witherspoon\, Pamela Gore\, and Scott Harris \nPamela Gore and Bill Witherspoon are authors of Roadside Geology of Georgia.  Pamela has previously published on the subject of earthquakes caused by exfoliation events in Georgia\, and is President of AGS. (There is a photo of an exfoliation pop-up structure at Stone Mountain on page 283 of the Roadside Geology of Georgia.) This will be the first field trip Bill has offered as a field trip organizer for AGS. Scott is Vice President of AGS and has organized several field trips for the Society. \n*If you would be unable to make this trip due to mobility issues\, there may be an option. Please email Bill at billspoon1@gmail.com.
URL:https://atlantageologicalsociety.org/event/special-event-field-trip-to-arabia-mtn-to-investigate-recent-exfoliation-popup-explosion/
LOCATION:Arabia Mtn Nature Ctr\, 3787 Klondike Rd\, Stonecrest\, GA\, 30038\, United States
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230729T100000
DTEND;TZID=America/New_York:20230729T120000
DTSTAMP:20260418T225853
CREATED:20230726T144512Z
LAST-MODIFIED:20230726T144512Z
UID:2430-1690624800-1690632000@atlantageologicalsociety.org
SUMMARY:PG Candidate Workshop: Engineering Geology
DESCRIPTION:Professional Geologist Candidate Workshop: Engineering Geology \nOpen to AGS members (to join go to: https://atlantageologicalsociety.org/member-benefits-4/ \nWhen: 10am-noon\, July 29 \nJoin via zoom: AGS members contact Ben Black for login info: benjamin.black@geologicllc.net \nCourse description: As part of our monthly workshop series\, AGS will offer a two-hour class on July 29 on the topic of Engineering Geology. It will cover Soil Mechanics and Soil Strength Testing (Laboratory and Field Methods)\, Geologic Hazards (Slope Stability\, Earthquakes\, etc.)\, Engineering Geological Mapping\, Site Investigation\, and time permitting a brief introduction to Rock Mechanics. A certificate of completion for continuing education will be offered for attendees that are Professional Geologists in need of CEUs/PDH. \n Instructor: Ben Black has over 26 years of experience in engineering geology\, hydrogeological\, and geotechnical assessment and analysis. He has a B.S. in Geology from Eastern Michigan University\, an M.S. in Geological Engineering from the University of Idaho\, and a Certificate in Applied Geotechnics from the University of Idaho. He is a Registered Professional Geologist in eight states and a Registered Professional Engineer in seven states.
URL:https://atlantageologicalsociety.org/event/pg-candidate-workshop-engineering-geology/
LOCATION:GA
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230627T180000
DTEND;TZID=America/New_York:20230627T200000
DTSTAMP:20260418T225853
CREATED:20230418T160304Z
LAST-MODIFIED:20230426T180000Z
UID:2343-1687888800-1687896000@atlantageologicalsociety.org
SUMMARY:AGS annual dinner social
DESCRIPTION:Come join us for some great food and fun! Door prizes\, giant screen movie and socializing! \nWhen: Tuesday\, June 27\, 2023\, 600-800pm \nWhere: Fernbank Museum \nCost: AGS Members Free; Guests $5 \nDoor prizes: Please bring items to give away as door prizes. These can be geology books\, maps\, samples\, rocks\, fossils\, company swag or an endless list of other things that might interest AGS members and friends. Tag you donation as “Mature” if you feel the gift is best suited for an adult or “Youth” for our young guests. \nSponsors: Please contact John Salvino if you would like to help sponsor this event: johnsalvino@bellsouth.net \nVolunteer: We need help setting up and cleaning up at the event. I you can help out\, please contact John Salvino: johnsalvino@bellsouth.net
URL:https://atlantageologicalsociety.org/event/ags-annual-dinner-social/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230530T180000
DTEND;TZID=America/New_York:20230530T200000
DTSTAMP:20260418T225853
CREATED:20230418T160104Z
LAST-MODIFIED:20230511T213405Z
UID:2341-1685469600-1685476800@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:Speaker: Randall Carlson \nTopic: Ice Age Megafloods\, Hypervelocity Impacts and the Energy Paradox \nSpeaker bio: Growing up in the glacially sculpted landscapes of rural Minnesota\, Randall Carlson developed a fascination with natural history at an early age. Regular outings to places like the Wisconsin Dells and the St. Croix wild and scenic river with its collection of giant potholes stimulated an interest in geology and the forces that created such unique features. A summer after high school hiking and camping across the American west confirmed his interest in Earth history and he subsequently embarked on a lifelong avocational study of the geological sciences. Following in his father’s footsteps as a builder he learned that geological knowledge aided his professional endeavors in many ways such as understanding the properties of building stone\, groundwater hydrology\, soil properties and so on. o increase his knowledge\, Randall enrolled in Dr. Pamela Gore’s geology program at Perimeter College in the early 1990s and somehow managed to earn Outstanding Geology Student of the Year Award. After that his geological interests intensified and he spent all his spare time studying the literature and going on field excursions\, often with professionals in the field. He became especially interested in the evolving insights of catastrophic geology and traveled extensively investigating such things as megafloods\, glacial geomorphology and the effects of hypervelocity impacts. He now leads geologically oriented tours and hosts a podcast Kosmographia.com where he shares his love of Earth history. \nAbstract: Since the 1920s and the work of J Harlan Bretz\, there has been a growing realization that colossal megafloods have been part of the Earths geological story. Such floods are closely associated with the phenomenon of glaciation as rapidly melting glacial ice is the primary source for the copious volumes of water comprising these floods. Following the advent of radiocarbon dating\, it became apparent that the deglaciation processes occurred much faster than previously assumed. This led to a realization that the known energies available to effect deglaciation were inadequate and hence led to the still unresolved “energy paradox.” Since the 1980s there has been a growing realization that hypervelocity impacts of cosmic bodies have played a critically important role in Earth history. There has also been a growing awareness that the end of the most recent ice age ca. 12 to 14 thousand years ago involved catastrophic climate changes in addition to megaflooding and a severe mass extinction of late Pleistocene megafauna. The most extreme of these climatic shifts is called the Younger Dryas and for decades presented a major challenge to workers to explain. In 2007 it was proposed that a major cosmic impact event occurred at the lower Younger Dryas boundary ca 12\,900 BP\, and since then a considerable amount of evidence has continued to accumulate supporting this interpretation. In this lecture and presentation Randall will present updated evidence that a major impact event occurred\, likely involving multiple pieces of a fragmenting comet and that at least several of these pieces impacted the great ice sheets of both North America and northern Europe directly\, with calamitous consequences.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-15/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230516T190000
DTEND;TZID=America/New_York:20230516T200000
DTSTAMP:20260418T225853
CREATED:20230418T155151Z
LAST-MODIFIED:20230418T155151Z
UID:2339-1684263600-1684267200@atlantageologicalsociety.org
SUMMARY:Special Online Presentation—Minerals of Georgia with Julian Gray
DESCRIPTION:When: May 16\, 2023\, 7pm\nThe meeting will be broadcast on Facebook live and to AGS members via zoom.\nSpeaker Bio: Julian Gray is a mineralogist at Focal Point Mineralogy\, LLC\n(focalpointmineralogy.com). He is former curator of Tellus Science Museum in Cartersville\, Georgia and the Rice Northwest Museum of Rocks and Minerals\, in Hillsboro\, Oregon. Julian also served as Executive director of the Rice Museum. A Georgia native\, Julian studied at Georgia State University where he earned his Bachelor of Science and Master of Science degrees in geology. He received additional training in micro-analytical techniques from the McCrone Research Institute in Chicago\, Illinois. Julian has worked with the U.S. Geological Survey and several commercial laboratories and environmental consulting firms. Julian lives in\nHillsboro\, Oregon with his wife\, Barb Epstien. \nAbstract: For the May 16th meeting\, Julian Gray\, co-author of the newest edition of the Minerals of Georgia\, will take us through the diverse mineral heritage of Georgia. The geology of Georgia encompasses a wide\nrange of rocks from Precambrian basement rocks\, Paleozoic sedimentary rocks\, igneous including pegmatites\, metamorphosed sedimentary and volcanic rock\, and unconsolidated sediments. Each of these environments host interesting mineral deposits of interest to mining and mineral collectors. To mineral collectors\, Georgia is best known for its amethyst from Jacksons Crossroads; beryl\, tourmaline\, and rose quartz from the Hogg Mine; and rutile\, lazulite\, ad iridescent hematite from Graves Mountain. But there are many active and historic mineral collecting localities in this state. For instance\, Georgia and North Carolina\nwitnessed America’s first gold rush in the early 1800s. Georgia’s famous marble mines have also produced spectacular\, but rare calcite specimens. Early in the Twentieth Century\, corundum was being actively mined\nin NE Georgia. During World War II\, Georgia’s pegmatites were exploited for beryllium and mica. Although many Georgia collecting sites are extinct or closed to collecting\, there are still many collecting sites that\nproduce minerals from lapidary material to rare micro-minerals.
URL:https://atlantageologicalsociety.org/event/special-online-presentation-minerals-of-georgia-with-julian-gray/
LOCATION:GA
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BEGIN:VEVENT
DTSTART;TZID=America/New_York:20230425T180000
DTEND;TZID=America/New_York:20230425T200000
DTSTAMP:20260418T225853
CREATED:20230105T155242Z
LAST-MODIFIED:20230215T151957Z
UID:2310-1682445600-1682452800@atlantageologicalsociety.org
SUMMARY:AGS Monthly Meeting
DESCRIPTION:Speaker: John Clarke\, Retired Assistant Director\, U.S. Geological Survey (USGS)\, Ga Water Science Ctr. \nTopic: Georgia’s groundwater wars \nAbstract: Water is the lifeblood of our planet. Throughout history to the present day\, wars have been waged over this precious resource\, and Georgia is no exception.  The presentation will provide an overview of conflicts over groundwater resources of Georgia and adjacent South Carolina\, Alabama\, and Florida. This includes saltwater intrusion along the coast\, groundwater contamination at the Savannah River Site\, and effects of agricultural pumping on streamflow in the Chattahoochee-Flint River Basin. \nSpeaker Bio: John Clarke retired in 2014 after a 35-year career with the USGS Georgia Water Science Center. As hydrologist and Assistant Director for Hydrologic Investigations\, he authored more than 50 papers on Georgia groundwater\, and twice served as president of the Georgia Ground Water Association. Notable project work included assessment of groundwater contaminants at the Savannah River Site; development of a hydrologic overview of Israel\, Jordan\, and Palestinian territories as part ongoing peace initiatives; and design and implementation of the Georgia Coastal Sound Science Initiative to assess coastal area groundwater resources and address issues of salt-water intrusion and resource sustainability.
URL:https://atlantageologicalsociety.org/event/ags-monthly-meeting-14/
LOCATION:Fernbank Museum\, 767 Clifton Rd\, Atlanta\, GA\, 30307\, United States
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